Question
Write a short note.
Anomalous behaviour of water
Anomalous behaviour of water
✓
Answer
- Normally, liquids expand on heating and contract on cooling. But water exhibits an exceptional behaviour in a temperature range of 0 °C to 4 °C.
- When water is heated from 0 °C up to 4 °C, instead of expanding it contracts. Its volume decreases continuously from 0 °C to 4 °C. At 4 °C, its volume is minimum.
- Upon heating further, however, it expands and its volume increases.
- This behaviour of water between temperature interval of 0 °C to 4 °C is called anomalous behaviour of water.
- Phenomena observed due to anomalous behaviour of water are:
- Survival of aquatic life in cold regions,
- Cracking of rocks in winter,
- Breaking of pipes for water supply in a cold region.
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